Flinging oneself or being flung down a flight of stairs with the sole purpose of avoiding or terminating a pregnancy.

"I just want to take a maternity leave to get away from my asshole of a boss. So I've come to work pregnant a few times. Sadly, when I show up to work with even the tiniest glow he leaps from his desk, screams "MORNING AFTER SPILL!" and I find myself tumbling down the office stairwell. Cheers to Plan C!"